Valve seat reamer



NW. 24, 1942. T. G. HARE 2,302,858

VALVE SEAT REAMER Filed April 12, 1940 23 r 1 U0 d? j /5 INVENTOR. Zre/m? Gfire ATTORNEY.

Patented Nov. 24, 1942 VALVE SEAT REAIVIER Terence G. Hare, Windsor, Ontario, Canada, assignor to Semco Products, Incorporated, Detroit, Mich., a corporation of Michigan Application April 12, 1940, Serial No. 329,268

9 Claims.

This invention relates to portable, hand-operated reamers such as are used for re-surfacing the valve seats of water faucets and the like, and i has for its primary object to provide an improved device of this character, both from the standpoint of easy and extremely secure attachment thereof to a faucet body and the accurate centering thereof with respect to the valve seat.

The main object, more specifically stated, is

- to provide a device of the type above mentioned is distributed over correspondingly greater areas of the faucet body, and localized pressure conditions such as might distort or injure the faucet I body are avoided. By providing for radial, rather than pivotal movement of the chuck members, movement of the chuck members relative to the portions of the faucet body does not occur while the clamping pressure is being increased toward its final stage. In comparison, a pivoted chuck member has an arcuate movement, and therefore must move relative to the surface it contacts during the pressure applying stage.

Another object is to provide a device of the character above mentioned wherein the chuck members are so mounted that theymay be quickly and easily removed and replaced. This enables substitution of chuck members of different sizes,

, and permits use of the same device in connection with faucets of widely varying sizes. Further, the cutting head, which performs the re-surfacing function, is likewise removable, in order that cutters of different size may be substituted to suit the size of the valve seat being treated.

Other objects and advantages will become more fully apparent as reference is had to the accompanying drawing wherein my invention is illustrated, and in which Fig. 1 illustrates, in section, a fragment of a water faucet, with a reamer, shown in elevation, mounted therein,

Fig. 2 is a transverse section taken on the line 2-2 of Fig. 1,

Fig. 3 is a vertical section of the reamer, and

Fig. 4 is an elevation ofa chuck member.

More specifically, I designates a fragment of a water faucet having a valve seat 2 and a hollow neck 3 coaxial with the valve seat. The neck 3 is, according to the usual practice, internally threaded at 4 and externally threaded at 5, the internal threads 4 ordinarily being provided for 55 common axis of the valve seat 2 and internally the reception of a valve plunger, and the external threads 5 being for the reception of a cap through which the valve plunger stem extends. In other words, the faucet illustration is intended to represent an ordinary or conventional water faucet. Ordinarily, when the valve seat 2 and the threads 4 and 5 are originally formed, the upper end 6, which is previously formed, is used as a positioning means, and the axis of the seat and threaded portions are perpendicular to the plane of this end.

The reamer comprises an elongate shaft or spindle I having a reamer 8 on its lower end and a handle 9 on its upper end. Loose upon this shaft l is a sleeve Ill having a conical head II on its lower end, and a portion extending from its other end screw threaded at 2. A collar I3 is slidably mounted upon the sleeve l0, and is held against rotation with respect to the sleeve by a pin it which slides in a longitudinally extending slot IS in the sleeve. The lower end of the collar I3 is bevelled at IE, or differently described is of frusto-conical form, and between the upper and lower ends is an integral, radially extending flange l'l.

Adjacent the conical end II the sleeve II] has a pair of radially extending flanges 18 which are formed with radial slots 19 which receive wedgeshaped chuck members 20. As may be seen upon reference to Fig. 3, one of the slots I9 is formed as a continuation of the slot I5, which extends entirely through the sleeve, and it will be readily understood that the other two slots l9 also extend through the sleeve radially, but need not extend a distance longer than that necessary to enable insertion of the wedge-like chuck members thereinto. The chuck members 20 are retained in their respective slots, and in contact with the opposed conical surfaces II and 16 by a spring band 2|.

A wing nut 22 is mounted upon the screw threaded end I2 of the sleeve It). When this nut permitting the chuck members to move radially inwardly. The chuck members are then inserted in the faucet body as shown in Fig. 1, with the flange l1 contacting the finished upper end 6 of the faucet body.- The flange IT, in contacting the surface 6,- holds the Whole reamer assembly in a position with its axis perpendicular to the plane of the surface 6, or, in other words, with its axis parallel to or possibly coincident with the threaded portion 5. The operator then holds the flange il stationary and rotates the nut in a direction to draw the head it and collar 53 toward each other. This forces the wedge shaped chuck members radially outwardly and into contact with the internally threaded portion As the chuck members contact the interior the faucet body they center the reamer and the whole assembly is positioned with its axis coincident with the axis of the valve seat. By the application of pressure on the handle 5 the cutting head 8 may then be operated to reface the valve seat.

The chuck members 29, as may be observed in the drawing, are comparatively long, therefore when they are pressed into clamp. engagement with the faucet body the pressure is distributed over a comparatively large Because their movement is radial they'do not r0 size shown in full lines, and also of other sizes 7 indicated by the broken lines 26 and 21 the same assembly may be clamped with respect to faucets of widely varying size. The cutting tool 8 is screw threaded onto the shaft or spindle l, as

indicated at 28, and also may be removed and replaced, for the purpose of adapting the device for work upon valve seats of different size, and also for the purpose of replacing a dull cutter with a sharp one.

Although a specific embodiment of the invention has been illustrated and described, it will be understood that various changes may be made within the scope of the appended claims without departing from the spirit of the invention, and

' such changes are contemplated.

What is claimed is:

l. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on its other end, and clamping means axially movable relative to the spindle and adapted to rotatably support the spindle relative to a faucet body, said clamping means comprising a multiplicity of chuck members, means supporting said chuck members for radial movement with respect to said spindle, said chuck members having oppositely inclined end surface forming wedge-like portions, and manually operable means engaging said wedge-like portions for projecting the chuck members radially outwardly.

2. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on the other, a sleeve loosely mounted on said spindle, said sleeve having a multiplicity of radial slots, chuck members received in said slots, spring means urging said chuck members radially inwardly, relatively movable oppositely inclined portions at the ends of said slots, said chuck members having wedgelike portions disposed between said inclined portions, and means for drawing said inclined portions toward each other.

3. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on the other, a sleeve loosely mounted on said spindle, said sleeve having a multiplicity of radial slots, chuck members received in said slots, a collar slidably and nonrotatably mounted on said sleeve, said sleeve and said collar having opposed inclined surfaces contacting opposite ends of said chuck members in such manner that relative axial movement of the sleeve and collar causes outward movement of the chuck members, and means for causing relative axial movement between the sleeve and collar.

4. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on the other, a sleeve loosely mounted on said spindle, said sleeve havin g a multiplicity of radial slots, chuck members recieved in said slots, a collar slidably and nonrotatably mounted on said sleeve, said chuck members having oppositely inclined ends, said sleeve and said collar having opposed inclined surfaces contacting opposite ends of said chuck members in such manner that relative axial movement of the sleeve and collar causes outward movement of the chuck members, and means for causing relative axial movement between the sleeve and collar.

5. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on the other, a sleeve loosely mounted on said spindle, said sleeve having a. multiplicity of radial slots, chuck members received in said slots, a collar slidably and nonrotatably mounted on said sleeve, said collar hava radiating flange with a seating surface substantially exactly radial with respect to the axis of the spindle, said sleeve and said collar having opposed inclined surfaces contacting opposite ends of said chuck members in such manner that relative axial movement of the sleeve and collar causes outward movement of the chuck members, and means for causing relative axial movement between the sleeve and collar.

6. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on its other end, a sleeve osely mounted on the spindle, said sleeve having a frusto-conical end portion and a multiplicity of radial slots adjacent thereto, chuck members yieldingly retained in said slots and having inclined end portions contacting said Irusto-conical end portion, a collar slidably and non-rotatably mounted on said sleeve and contacting the other ends of said chuck members, and means for causing movement of the frustoconical end and collar toward each other.

7. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on its other end, a sleeve loosely mounted on the spindle, said sleeve having a frusto-conical end portion and a multiplicity of radial slots adjacent thereto, chuck members yieldingly retained in said slots. and having inclined end portions contacting said frusto-conical end portion, a collar slidably and non-rotatably mounted on said sleeve and contacting the other r ends of said chuck members, said collar having a frusto-conical end portion in opposed relation to the first frusto-conical portion, said chuck members having inclined portions contacting the frusto-conical end of the collar, and means for moving the two frusto-conical portions toward each other.

8. A device of the character described comprising an elongate spindle having a cutter on one end and a handle on its other end, a sleeve loosely mounted-on-the spindle, said sleeve hav-w ing a frusto-conical end portion and a multiplicity of radial slots adjacent thereto, chuck members yieldingly retained in said slots and having inclined end portions contacting said frusto-comcal end portion, a collar slidably and non-rotatably mounted on said sleeve and contacting the other ends of said chuck members, said collar having a frusto-conical end portion in opposed relation to the first frusto-conical portion, said chuck members having inclined portions contacting the frusto-conical end of the collar, said sleeve having a screw'threaded portion, and a nut on said screwthreaded portion for pressing said collar toward the frusto-conical end of the sleeve.

9. A tool for surfacing the valve seat of a work piece such as a faucet, comprisin a rotatable spindle having a seating tool on one end, a sleeve member rotatably and slidably positioned on the spindle, a collar member mounted on th sleeve member for axial movement relative thereto, said collar member and sleeve member each having an abutment portion with a contacting face, a plurality of circumferentially spaced chucks supported by one of the members for radial movement relative thereto, said chucks being positioned between the abutment portions of the sleeve and collar members, each chuck having faces for contact with the faces of the said abutment portions, at least one of the faces at each location of contact being inclined at an oblique angle relative to the axis of the sleeve and collar member, said inclined faces having substantially the same angle relative to the said axis, and means for adjustably shifting the sleeve and collar members axially relative to each other to cause the abutment portions to approach each other and shift the chucks radially outwardly for gripping the interior wall of the Work piece.

TERENCE G. HARE. 

